I don't know how truthfully they've handled it, but historical accuracy is one of the main selling points of KC:D. I've only heard about the game through word-of-mouth, but that's been the most repeated detail I've heard. Less fantasy and hollywood, and a more accurate representation of the time period.

One of the main features listed on their Steam page:

> Historical accuracy: Meet real historical characters and experience the genuine look and feel of medieval Bohemia.

It's worth pointing out that the "historical accuracy" comes less from a medievalist perspective and more of an appeal to tradition. The characters and setting are often amazingly historically accurate in some parts while following the same old revisionist tropes in others. Given some of the political statements of the developers, this isn't all too surprising.

It's a bit like reconstructing a vision of the 1950s US by exclusively looking at 1950s TV ads. Yes, you'll get a lot of details right to an astonishing extent but the result will not at all be representative of what living in the 1950s was actually like.